Sickle bar



Nov. Z3 1926.

J. E. DREW SI CKLE BAR gfx/ENTOR.l M

A TTORN E YS Patented Nov.v 23, 1926.

UNITED STATES PATENT OFFICE.

JOHN E. DREW, OF JERSEY CITY, NEW JERSEY, ASSIGNOR T0 AMERICAN MACHINE il AND FOUNDRY COMPANY, A CORPORATION OF NEW JERSEY.

sroKLn BAR.

Application filed August 26, 1.924.

This invention relates to an improved sickle-bar for harvestingmachines, and it has for its main object the production of a device ofthis character which can be produced at a low cost without sacriiicingdurability or eiiiciency. lVith this and other objects not specificallymentioned in view, the invention consists in certain construct-ions andcombinations which will be hereinafter full described and thenspecifically set forth in tie claims hereunto appended.

In the accompanying drawings which fo m a. part of this specificationand in which like characters of reference indicate the same or likeparts, Fig.` l is a plan view, partly sectional, of a device constructedin accordance with the invention, Fig. 2 is a perspective view showingIone of the blades and the locking wedge out of engagement with thereciprocating member, and Fig. 3 is a' perspective view showing one ofthe blades locked in position in said member.

In carrying the invention into effect, there is provided a member havinga series of slots provided with oppositely flared walls, a correspondingseries of removable blades engaging said walls,'and means for lockingsaid blades in said member. These parts may be varied within the scopeof the claims, for the particular structure selected to illustrate theinvention is but one of a number of possible concrete embodiments of thesame. The invention, therefore, is notI to be restricted to the precisedetails of the structure shown and described. T

As shown, there is provided a reciprocating member 4 having a series ofslots provided with oppositely flared walls 5, one wall of each slotbeing arcuate in formation and of radii permitting production by millingoperations and the other wall being kin part arcuate at 6 and in partangular at 7.

Fitting in each slot is a blade 8 having surfaces engaging the walls 5and 6 7 of the member slots. Each blade also has an angular recess 9adjacent the angular wally 7 of its slot, and Lhe blade is locked inposition in the member by means of a. wedge 10 engaging said recess andthe angular slot wall 7 as clearly shown in Figs. 1 and 3.

To .attach a blade to th-e membery it is in- Serial No. 734,170.

serted in its slot, and then the wedge is driven home. To remove ablade, the wedge l0 is withdrawn by means of the engagement of theaperture thereof with a pin Wrench not shown. After the wedge has beenwithdrawn, the blade can be slipped out of the member slot withoutdifliculty.

What is claimed is:

l. A sickle-bar comprising a member having a series of slots providedwith two end walls each of which is oppositely flared, a correspondingseries of removable blades engaging said walls, and means for lockingsaid blades in said member.

Q. A sickle-bar comprising a member hav-,

slot beingarcuate in formation and the other wall of each slotI being inpart arcuate and in part angular in formation, said arcuate walls havingcentres offset from said sicklebar.

3. A sickie-bar comprising a member having a seri-es of slots providedwith two end walls each of which is oppositely flared, a

corresponding series of removable blades engaging said walls, and meansfor locking said blades in said member, said mea-ns including an angularrecess formed in each blade and a wedge engaging said recess and one ofthe slot Walls.

4. A sickle-bar comprising a member havving a series of slotsprovidedwith two end walls each of which is oppositely flared, acorresponding series of removable blades engaging said walls, and meansfor locking said bladesA in said member, one wall of each slot beingarcuate in formation andthe other wall of each slot being` in partarcuate and in part angular in formation said arcuate walls havingcentres offset from said sickle-bar, and said means including anangularrecess formed in each blade and a wedge engaging said recess andone of the slot walls.

In testimony whereof, I have signed my name to this specification.

JOHN E. DREW;

